Elevating device for garbage trucks



Oct. 13, 1959 G. GLANZ EILEVATING DEVICE FOR GARBAGE TRUCKS 2 Sheets-Sheet 1 Filed Jan. 3, 1956 IN V EN TOR.

' GEORGE GLANZ ATTORNEYS G. GLANZ ELEVATING DEVICE FOR GARBAGE TRUCKS 2 Sheets-Sheet 2 INVENTdR. GEORGE GLANZ ATTO RNEY s Oct. 13, 1959' Filed Jan. 3, 1956 V a H J. M 2 v 5 7 V 2 7' 4 m m I M mw am m B United States Patent Office 2,908,410 Patented Oct. 13, 1959 ELEVATIN G DEVICE FOR GARBAGE TRUCKS George Glanz, Portland, Oreg. Application January 3, 1956, Serial No. 556,878 3 Claims. (Cl. 214-302) The present invention relates to elevating devices for garbag trucks.

The primary object of the invention is to provide an elevator on the side of a garbage truck for elevating garbage cans or other containers from the ground up to the top of the body of the truck, where the same can be dumped into the truck, either manually or automatically.

Another object of the invention is to provide an elevating device of the type described above which can be folded against the side of the truck while not being used.

A further object of the invention is to provide hydraulic means for raising the platform of the elevator up and down by a simple control mechanism operated by the operator of the truck.

Other objects and advantages will become apparent in the following specification when considered in the light of the attached drawings, in which:

Figure 1 is a fragmentary side elevation of the truck body with the elevating mechanism shown in lowered operating position, parts broken away for convenience of illustration.

Figure 2 is a fragmentary enlarged transverse crosssection of the hydraulic control valve, taken on the line 2--2 of Figure 1, looking in the direction of the arrows.

Figure 3 is an enlarged fragmentary vertical crosssection, taken on the line 33 of Figure 4, looking in the direction of the arrows.

Figure 4 is a fragmentary horizontal cross-section, taken on the line -44 of Figure 1, looking in the direction of the arrows, with parts broken away for convenience of illustration.

Figure 5 is an enlarged fragmentary vertical crosssection, taken on the line 5-5 of Figure 1, looking in the direction of the arrows.

Figure 6 is a fragmentary perspective view of the raising and lowering carriage frame.

Figure 7 is a fragmentary rear elevation of the garbage truck, illustrating the elevator in folded, transporting position.

Figure 8 is a fragmentary side elevation of a modification for mounting the platform so it can be pivoted for dumping its load upon reaching the top edge of the truck body.

Referring now to the drawings in detail wherein like refer nce numerals indicate like parts throughout the several figures the reference letter B indicates the body of a garbage truck. Garbage truck B is provided with hinged side panels 10 that can be lowered or raised depending upon the requirements. An elevator mechanism including vertical channels is secured to the solid portion 11 of the body B by welding or any other suitable means.

A secondary frame 13, consisting of vertical channels 14 and a cross member 15, is adapted to operate vertically within the channel ways 12 and 12A, referring particularly to Figures 1, 4 and 5. The channels 14 are slidably guided within the channels 12 by an inner vertical leg 16 forming part of the channel 12. This may be a flat bar welded to one leg of the channel 12, or it may be integral with the channel 12.

Operating within the channels 14 of the frame 13 is a carriage C which consists of the flat forward body member 17, having a right angle bend 18 and a reverse angle 19 terminating in a fiat bar 20, referring particularly to Figure 6. Journalled to the fiat bar 20 by spindles 20A are trunnion wheels 21. The trunnion wheels 21 travel on the vertical rails 22, which are welded to legs 23 of the vertical channels 14 of the frame 13, referring particularly to Figures 4 and 5.

A folding platform P, consisting of transverse frame members 25, bound together by longitudinal frame members 26 and 26 and having a floor plate 27 mounted thereon is provided for supporting an operator along with loads of materials to be raised and dumped into the truck. A pair of transverse members 25 extend towards the carriage C to form supporting brackets 28. The upper ends 29 of these brackets 28 are pivotally carried by the shoulder bolts 30, which enter the holes 31 formed in the angle '18 of the carriage C and are locked therein by the nuts 32, referring particularly to Figures 4, 5 and 6.

A heel 33 of the brackets 28 contacts the reverse angle 19 supporting the platform P in a level position, but permitting the same to move in the direction of the arrow, or to the position shown in Figure 7 when raised. The platform P may be extended for additional width, referring to Figure 3, by providing a telescopical section 34 having a floor plate 27 which is adapted to slide over the plate 27. The floor plate 27' is provided with depending members 35 which engage over the transverse members 25 at opposite ends of the platform P and carry spaced flanges 35 which engage behind the transverse members 25 as shown in Figure 1.

Referring to Figures 1 and 4, secured to a step 36 of the body B is an angle iron 37. The angle 37 may also be secured to the vertical channels 12 if desired. A hydraulic cylinder 38 is mounted upon the angle 37. The upper end of the cylinder 38 is also secured to the side of the truck B by the clamp 38A. Secured to the upper end of a piston rod '39 is a cross head 40 in which is mounted a shaft 41. Journalled to the shaft 41 are cable pulleys 42 and 43. Cable sheaves 44 are journalled to vertical brackets 45 forming part of the base member 37. A pair of-cables 46 and 46' are trained over the pulleys 42 and 43 and the sheaves 44 as follows. The lower ends 47 of the cables 46 and 46' are anchored at 48 to the carriage body member 17, and are trained about the pulley 42, down around the sheave 44, over the pulley 43 and dead-ended to the brackets 45 at 49. Hydraulic fluid is supplied to the hydraulic cylinder 38 from a hydraulic valve 50, referring to Figures 1 and 2, which receives hydraulic pressure through a hose line 51 from the hydraulic pump (not shown) and delivers hydraulic fluid through a hose line 52 to the cylinder 38 when a control rod 53 is operated by the operator.

The control rod 53 is guided and supported by guides 54 which project from the vertical channels 12, the lower end of the rod 53 is pivotally connected to the bell crank 55 at 56. The control rod 53 is accessible at all times to the operator of the elevator.

Referring to Figure 8, a modified platform P, mounting structure is illustrated in which a means of tilting the platform P while in raised position is disclosed. A gear 58 is keyed to a stub shaft 59 which replaces the shoulder bolts 30, referring to Figure 4. A gear rack 60 is fixedly secured to the uprights 12 and is adapted to be contacted by the gear 58 on the upward movement of the platform P. This will tilt the platform P in the direction of the arrow for dumping a load therefrom. It is. preferable that a container 61 be secured to the platform P by any suitable means, such as bolts 62, or some quick release clamp may be employed (not shown).

P, it!

I will now describe the operation of my new and improved elevating device for garbage trucks. Referring to Figure 7, when the elevator is in storage position the platform P and carriage C are moved to operative position in the following manner. Fixedly secured to and extending rearwardly from the upper edge of the platform P are brackets 34'. When the platform is raised the brackets 34 are adapted to engage the rear of the outer legs of the vertical channels 12, as indicated in dotted position in Figure 7. This prevents the platform P from hanging downwardly in operating position until the carriage C is raised sufficiently to release the bracket 34 from behind the front leg of the channels 12.

By operating the control rod 53 the hydraulic valve 50 can be made to raise the platform P sufficiently to unlatch the brackets 34' from behind the vertical legs of the channels 12, at which time the platform P will hinge down to a level position. By operating the control rod 53 in the opposite direction the valve 50 will bleed the hydraulic fluid back into the hydraulic storage tank (not shown). This permits the carriage C, the frame 13, and the platform P to travel downward by their own weight. When the cross member 15 of the frame 13 touches the ground surface the carriage C will be lowered to the fullest extent that the piston rod 39 and the cables 46 and 46 will permit.

When the load is placed on the platform P to be dumped into the truck the operator operates the control rod 53, which operates the hydraulic valve 50 delivering fluid through the hose connection 51 into the lower end of the cylinder 38, forcing its piston (not shown) and rod 39 upwardly. This raises the carriage C and the platform P using the cables 46 and 46' over their respective sheaves.

When the trunnion wheels 21 travel up within the channels 14 and reach the upper ends 14A thereof the movement of the carriage C will cease. At this point the frame 13 will be raised within the channel 12 until they have reached their uppermost travel, or the full distance that the piston rod 39 within the cylinder 38 will raise the carriage C and platform P. The load then may be dumped into the truck B by the operator, or automatically by the structure shown in Figure 8.

When it is desired to fold the elevator in inoperative position, as shown in Figure 7, the platform P is raised slightly above the position shown so that the brackets 34' can be guided into the upper ends of the channels 12 whereupon the platform P is lowered sufficiently to prevent them from coming out of the channels 12, thus holding the platform P in the position shown in Figure 7 so that the truck B can be moved about from place to place with maximum clearance.

Having thus described the preferred embodiments of the invention, it should be understood that numerous other modifications and structural adaptations may be resorted to without departing from the scope of the appended claims.

What is claimed is:

1. A load elevator for trucks comprising a pair of spaced apart parallel upright inwardly opening straight channels secured to the side of said truck and extending vertically thereon, a second pair of spaced apart parallel upright inwardly opening straight channels telescopically mounted in said respective first pair of channels for vertical sliding movement therein throughout the length of said first pair of channels, an upright rail secured to each of the opposing faces of each of said second pair of channels, a carriage extending between said second pair of channels, upper and lower grooved rollers journalled on opposite edges of said carriage with each of said rollers engaging between the rails on opposed faces of said second pair of channels for vertical movement completely within said second pair of channels, a platform support mounted in the carriage for vertical swinging movement thereon, a platform secured to said platform support and adapted to be pivoted from a horizontal load carrying position to a vertical storage position with the swinging movement of said platform support, hydraulic means for moving said carriage vertically in said second pair of channels and means on said platform adapted to engage said first pair of channels to releasably support said platform in its folded storage position.

2. A device as claimed in claim 1 wherein said means for elevating said platform comprises a pair of pulleys pivotally carried by said truck, a hydraulic cylinder carried by said truck, pulleys carried by a piston rod extending from said hydraulic cylinder, and a pair of cables trained over said pulleys, said cables each having one end anchored to said truck and the other end anchored to said platform support.

3. A device as claimed in claim 1 wherein said platform is provided with an extensible platform member slidably secured to said platform.

References Cited in the file of this patent UNITED STATES PATENTS 1,775,726 Knigge Sept. 16, 1930 2,497,474 Snow Feb. 14, 1950 2,592,324 Oliver Apr. 8, 1952 2,640,612 Barry June 2, 1953 2,641,336 Chanda June 9, 1953 FOREIGN PATENTS 844,262 Germany July 17, 1952 

